Switch to latest nightly

.github/workflows/ci.yml

@@ -96,8 +96,7 @@ jobs:
         name: Install latest nightly
         uses: actions-rs/toolchain@v1
         with:
-          # temporary due to https://github.com/Xudong-Huang/generator-rs/issues/21
-          toolchain: nightly-2020-05-01
+          toolchain: nightly
           override: true
       - if: matrix.channel == 'stable'
         run: rustup component add clippy

Cargo.lock

@@ -350,9 +350,9 @@ dependencies = [
 
 [[package]]
 name = "generator"
-version = "0.6.20"
+version = "0.6.21"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "caaa160efb38ce00acbe4450d41a103fb3d2acdb17ff09a7cf38f3ac26af0738"
+checksum = "add72f17bb81521258fcc8a7a3245b1e184e916bfbe34f0ea89558f440df5c68"
 dependencies = [
  "cc",
  "libc",